/// <summary>
 /// Visit a parse tree produced by <see cref="StlAsciiParser.solid"/>.
 /// <para>
 /// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
 /// on <paramref name="context"/>.
 /// </para>
 /// </summary>
 /// <param name="context">The parse tree.</param>
 /// <return>The visitor result.</return>
 public virtual Result VisitSolid([NotNull] StlAsciiParser.SolidContext context)
 {
     return(VisitChildren(context));
 }
            public override Polygon3[] VisitSolid(StlAsciiParser.SolidContext context)
            {
                FacetVisitor facetVisitor = new FacetVisitor();

                return(context.facet().Select((x) => facetVisitor.VisitFacet(x)).ToArray());
            }